The Hi-Dri range of compressed-air membrane dryers from Hi-Line Industries is designed for a variety of industrial plant installations including specialised commercial operations.

The dryers feature a patented arrangement of structurally packed permeable hollow fibres specially wound on a support core; this is said to create an optimised design combining efficient air flow with high contact areas.

As the humid compressed air passes through the Hi-Dri unit, water vapour diffuses through the walls of the hollow membrane fibres without loss of compressed air.

At the dryer outlet, a small volume of the now dry air is expanded and released into the annular space between the membrane fibres and the outer aluminium shell.

This air purge then sweeps away entrained water vapour to the atmosphere as a humid air stream.